Assigkob



'-'Pafmed July 15,;191

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l Gr H.l .Z0ucK. A

BLOWPIPE.' APPLICATION FILED JAN. 8 15.319.'Y

UNITED srnrns es sisossm@ f GEORGE H. zonen, or ORANGE, ANEW JERSEY,essie-nos fro einl saenuc'ron COMPANY,

' y INC., a ooiarone'rron or New feiern stotteren.

To allzeit-0in 'it 'may concern Pie it known that 1,',Gnonen H. Zonen,y

residing at Orange, in the ,county of Essex, State of New Jersey, haveinvented certain new and yusefulI Improvements ,H1 Blowpipes;.,and I dohereby declare the lvfr qlltiivj ing'to be a full, clear, and exactdescription of the "ivention, such as .will enable. others skilled;inthe art to which it appertains to make and usethe same.

My v'invention relatesA to blowpipes, and

moretpar-ticularly to a blowpipe of thelow pressure?l type, although'v1gases at ",high

pressure may be successfully utilized in the blowpipehereinafterdescribed,4 and the iiiventioi'i'- is nottherefore limited'or restricted to use-with, gas` at any specific pressure. y Among theobjects ofmy invention is the provision cfa blowpipe having interchange.

cape o'iniiXiiig-of the gases in othertlian' the predetermined man-ner,

Another object of my invention is the provisioiuot` aiblowpipe of thecharacter dey scribed in which the proportioning of the' gases employedis governed by the tip so that a proper mixture is insured in tipsiiitended to produce flames of ditierent sizes and heating capacities,the only adjustment necessary to produce a flame of given size being theinsertion of a tip adapted for this purpose.

Another object of my invention is the provision of a bl'owpipe tipconstructed in two or more sections of diierent metals joined in such amanner that escape of gases at the joint is impossible.

AFurther objects and advantages of my invention reside in the variouscombinations hereinafter described and claimed as will be apparent as itis better understood by 'reference t0 the following speciication whenread in connection with the accompanying drawings illustrating thepreferred embodiment of my invention, in which Figure 1 is alongitudinal section through a b lowpipe constructed in accordance withmy invention.

Fig.. 2 is a section on the line 2-2 of rai;

ig. 3 is a sectional view of the llerat the rear of the tip; v

Specification of Letters Patent.

f operation.

PatentedJuly 15, 191% y l, Application led January 8, 1919. Serial No.270,115.

4 is rear eleva-tion of the filler and 5 isa section 0n the line oitrig. Fig. el.

One of the most perplexing problems which has heretofore engageddesigners oi biowpipes is the diliculty et sealing the connectionbetween the tip and head to' pre- "veiitescape .of gases andto insurethe desired proportioning essential to successful While this problem isvroost acute in high pressureblowpipes, it is also present in clowpressure7 work. The present invention is operable independent ofpressures employed and is constructed to providethe essential sealingunder any `conditions. y

Reterring to the drawing, whichlillusi trates the best mode oflembodying my inyventioiiin a practical blowpipe, 5 indicates aheadprovided with passages 6 and 7 to Awhich oxidizing and combustible gasesare respectivelydelivered throughpipes 8 and 9L They passage. 6 ispreferably axially disposed withinthe head and terminates at the apex ofaconical seat 10. VAn annular chan,l nel 11 is termed in the seatconcentric With the passage 6 and the in this channel.

A tip 12 is provided with a longitudinal discharge passage 13terminating at its inner endin a chamber 14. A filler 15 is threadedlysecured to the tip Within the chamber 14, and is `preferably providedwith a beveled edge 16 engaging a cooperating beveled shouldersurrounding the chamber 14, to form a secure seal, preventing escape ofgases from the chamber 14. The filler 15 is provided with an. injectornozzle 17 having apassage 18 which alinea with the paspassages 7terminate .sage 6 when the tip is held in assembled relation with thehead by a nut 19.

A conical recess is formed in the end of the filler 15 Which cooperateswith the seat l0 in the head on both sides of the channel 11 to seal thejoint ybetween the head and'tip and prevent escape or premature mixingof the gases issuing from the passages 6 and 7. 'Preferably an annularchannel 20 is provided i'n the surface of the conical recess,registering with the channel 11. A plu`v rality Iof openings 21 in thei'iller 15 surrounding ithe injector nozzle 17 permit the passage of gasfrom the channel 20 to the mixing chamber 14.

In operation, the oxidizing gas. issuing troni the passage 1H in theinjector nozzle 1T into the chamber 1l. draws combustible gas properlyproportioned by the size ot' the inljector nozzle and its relation tothe passage 125. The. gases are mixed in passag'e 123 and the mixture isdischarged at the outlet end of the tip. Owing' to the provision ot' thegastight seal at the junction ot' the head and filler. no mixture ot'the gases other than as described can occur and proper proportioning istherefore insured. Nor can :in v gas escape troni thtpassage in the heador t'rom the mixing chamber. The. proportion ot' the gases mixed isconti'olled within the tip so that removal and substitution ot' anothertip is'the only adjustment necessary to obtain flames ot' any desii'edsize within the range ot' the device.

It. is sometimes desirable to construct that portion ot the tipwhich issubjected t-o the highest heat of copper while the remainder is. forvarious reasons. constructed ot' a inetal having a lower coellicient otexpansion. such, for example. as phosphor bronze. I have. discoveredthat a gas-tight joint may be formed between the two sections byinternally threading the rearward portion ot tbe tip and externallythreading the copper end 22 at 23. Ihen the two parts are lioined andsubjected to heat in use, the expansion ot' the copper exceeds that ot'phosphor bronze suiticiently to seal the threads but not enough todisrupt the tip.

The advantages ot' iny invention as hereinbet'ore outlined may beIachieved with various modifications oi the structure as shown, thesemodifications being within the spirit and scope of iny invention ashereinafter de- 'lined in the claims.

What 1 claim is:

1 In a device ot' the character described the. combination with a solidhead having passages tliei'eiii for oxidizing and combustiblev gases. aprojecting conical seat, and a wall integral with said head andextending beyond said seat, ot' a tip having a discharge passage, achamber communicating therewith and a filler atthe 4rear of saidchamber, and provided with inlets for the two kinds of gasescommunicating with the passages in said head. said tiller having' aconical recess cooperating with said seat to prevent premature mixing orescape ot' said gases and a nut engagingsaid wall and tip to hold thelatter in assembled relation with said head.

:2. In a device ot' the character described the combination with a solidhead having passages therein for oxidizing and conibustible gases. aprojecting conical seat and a wall integral with said bead and extendingbeyond said seat, of a tip having a discharge passage, achamber.communicating therewith. a filler at the rear ot said chamberand tlireadedly engaging said tip and a beveled shoulder on said tipwithin said chamber, .said tiller ha'ving a cooperating beveled edgeengaging said shoulder and a surface cooperating with said seat toprevent prematin-'e mixing or escape ot' said gasesand a nut engaging'said wall and tip to hold the latter in assembled relation with saidhead. In testimony whereof I atli'x my signature.

GEORGE H. ZUUCI.

